Medellín's urban forest miracle

Medellín transforms its urban landscape with green corridors, showing the world how to beat urban heat.

Peter Yeung reports for Reasons to be Cheerful.


In short:

  • Medellín's Green Corridors project has significantly lowered the city's temperature by planting trees and creating green spaces.
  • This initiative has not only cooled the city by 2°C in three years but also improved air quality and increased biodiversity.
  • The effort was led by the community, with support from city officials, and is seen as a model for other cities facing the heat island effect.

Key quote:

“Medellín grew at the expense of green spaces and vegetation. We built and built and built. There wasn’t a lot of thought about the impact on the climate. It became obvious that had to change."

— Pilar Vargas, a forest engineer working for City Hall

Why this matters:

Medellín's success in cooling its urban environment demonstrates a sustainable way to tackle the urban heat island effect, improving living conditions and health outcomes. As cities worldwide grapple with rising temperatures, this Colombian city's approach offers a blueprint for urban resilience and environmental stewardship.

Be sure to read about Tucson's ambitious tree planting goal aims to improve the health of residents, wildlife, and the watershed.

Drone aerial view of new Microsoft data centers.
Credit: Mauvries/BigStock Photo ID: 465964923

Inside the secretive deal for a $10 billion data center in rural North Carolina

Residents say they were left out of the decision-making process for a project that includes hundreds of polluting diesel generators.
A grey wolf vocalizing

Phoenix Species Project announces funds for imperiled wildlife

A new fund called the Phoenix Species Project will provide $200 million to help pull imperiled species back from the brink of extinction.
A view of an oil refinery at sunset
Credit: anekoho/Big Stock Photo ID: 64453174

Court rulings could force Texas to obey tougher air pollution standard

Texas Gov. Greg Abbott said Biden-era EPA's soot pollution standards were "unlawful." This summer, federal courts ruled the opposite.
A man welding a piece of metal onto a boat

Extreme heat costs poorest workers their health and wages

When temperatures soar across Asia's cities, informal workers face a choice: risk their health or lose their income. For many, the effects don't end when the workday is over.
A view of electricity towers with blue wires stretching into the distance against a red sky during sunset

The state that's beating dirty electricity

Abundant sunshine and smart policy have made New Mexico’s grid far more climate-friendly. 
A large storm front approaching a beach from the ocean, with a danger sign in the foreground

Opinion: Why local action is key to surviving America's climate crisis

The decisions we each make every day, particularly how we use energy, influence whether the weather becomes more extreme. 
Rows of solar panels stretching up a hill toward a farm field

Virginia lays groundwork to combine more solar with farming

A new state law aims to spur agrivoltaics projects where crops or livestock thrive amid solar panels, as AI power demand booms and concerns about farmland loss rise.

From our Newsroom
Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

One facility has emitted cancer-causing chemicals into waterways at levels up to 520% higher than legal limits.

Regulators are underestimating health impacts from air pollution: Study

Regulators are underestimating health impacts from air pollution: Study

"The reality is, we are not exposed to one chemical at a time.”

Pennsylvania governor Josh Shapiro speaks with the state flag and American flag behind him.

Two years into his term, has Gov. Shapiro kept his promises to regulate Pennsylvania’s fracking industry?

A new report assesses the administration’s progress and makes new recommendations

silhouette of people holding hands by a lake at sunset

An open letter from EPA staff to the American public

“We cannot stand by and allow this to happen. We need to hold this administration accountable.”

wildfire retardants being sprayed by plane

New evidence links heavy metal pollution with wildfire retardants

“The chemical black box” that blankets wildfire-impacted areas is increasingly under scrutiny.

Stay informed: sign up for The Daily Climate newsletter
Top news on climate impacts, solutions, politics, drivers. Delivered to your inbox week days.